body {
    background-color: #f2f3f5;
}

.layui-card {
    margin: 20px;
}

/* 控制按钮两段对齐 */
.layui-card-header {
    display: flex;
    justify-content: space-between; /*盒子里面的内容两端对齐*/
    align-items: center;  /*上下居中对齐*/
}